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<script>
    // 题解：如何能判断三条边是否能构成三角  a+b>c
    var largestPerimeter = function (A) {
        A.sort((a, b) => a - b);
        for (let i = A.length - 1; i >= 2; --i) {
            if (A[i - 2] + A[i - 1] > A[i]) {
                return A[i - 2] + A[i - 1] + A[i];
            }
        }
        return 0;
    };

</script>